Welcome to the LOA (Lower Olefins and Aromatics) REACH Consortium website.

This website is intended to provide some general information on the Consortium, its objectives and scope, the substances which were registered in 2010, costs of letters of access for those substances and instructions on how to join any of the SIEFs currently managed by the LOA REACH Consortium.

In June 2008, the Lower Olefins and Aromatics REACH Consortium (“LOA REACH Consortium”) was established.  Any eligible company that submitted a signed Accession Agreement by 31 December 2009 was able to complete the admission process to join the Consortium. 

The LOA REACH Consortium remained an open-ended consortium that welcomed applications from EU and non-EU manufacturers and importers of Lower Olefins and Aromatics. Non-EU manufacturers must be represented by an EU-based Only Representative.

Membership of the LOA REACH Consortium is currently closed. In January 2016 there are 50 Members 


The LOA REACH Consortium’s purpose is to assist its Members with their REACH registrations in a cost efficient manner by combining financial and human resources.  It also ensures that that the documentation produced continues to be fit for the purpose of supporting Member Companies' REACH registrations.


  • 120 Lower Olefin and Aromatic substances (for a full listing see the substance information tab) 
  • Substances and UVCB streams 
  • 12 Categories to group similar UVCBs for efficient data sharing.  

Major activities

  • Develop and maintain joint technical dossiers for registration purposes
  • Gather and assess existing studies
  • Identify data gaps, apply read-across approaches where possible, assess opportunities for alternative approaches 
  • Develop testing proposals to close identified data gaps,  prepare study summaries and robust study summaries for regulatory submission  
  • Develop uniform classification and labelling proposals according to CLP 
  • Prepare Chemical Safety Reports and “Guidance on safe use” in respect of uses common to at least half of the Members
  • Perform risk assessments
  • Initiate testing where required


The LOA REACH Consortium has continued to develop the dossiers, with Lead registrants  making regular updates to reflect changes in guidance, interpretation of the REACH Regulation, and changes to IT Tools such as IUCLID and Chesar. Recently (2015) LOA has run data call ins to review use patterns and the available analytical data on UVCB streams. These data are being used to inform the next updates of the dossier on the substances managed in LOA.